package com.gitee.mall.seckill.scheduled;

import com.gitee.mall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品上架
 * 每天晚上3点；上架最近三天需要秒杀的商品。
 * 当天00:00:00  - 23:59:59
 * 明天00:00:00  - 23:59:59
 * 后天00:00:00  - 23:59:59
 */

@Slf4j
@Service
public class SeckillSkuScheduled {

    @Autowired
    private SeckillService seckillService;

    @Autowired
    private RedissonClient redissonClient;

    private final String upload_lock = "seckill:upload:lock";

    /**
     * 上架最近三天秒杀商品信息
     */
    @Scheduled(cron = "0 * * * * ?") //每分钟执行一次吧，上线后调整为每天晚上3点执行
    public void uploadSeckillSkuLatest3Days() {
        //1、重复上架无需处理
        log.info("上架秒杀的商品信息...");
        // 分布式锁。锁的业务执行完成，状态已经更新完成。释放锁以后。其他人获取到就会拿到最新的状态。
        RLock lock = redissonClient.getLock(upload_lock);
        boolean locled = false;
        try {
            locled = lock.tryLock(10, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }

        if (locled) {
            try {
                seckillService.uploadSeckillSkuLatest3Days();
            } finally {
                lock.unlock();
            }
        }

    }

}
